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re•ac•tance

Pronunciation: (rē-ak'tuns),[key]—n.1. Elect.the opposition of inductance and capacitance to alternating current, expressed in ohms: equal to the product of the sine of the angular phase difference between current and voltage and the ratio of the effective voltage to the effective current. Symbol: X Cf. capacitive reactance, inductive reactance.2. Acoustics.See acoustic reactance.